Others still are much less well-endowed. One such is the Pedestrian Locust (Pezotettix pedestris, Lin.), the companion of the Alpine Analota on the ridges of the Ventoux. This foot-passenger strolling amid the paronychias (P. serpyllifola) which lie spread in silvery expanses over the Alpine region; this short-jacketed hopper, the guest of the androsaces (A. villosa), whose tiny flowers, white as the neighbouring snows, smile from out of their rosy eyes, has the same fresh colouring as the plants around him. The sunlight, less veiled in mists in the loftier regions, has made him a costume combining beauty and simplicity: a pale-brown satin back; a yellow abdomen; big thighs coral-red below; hind-legs a glorious azure-blue, with an ivory anklet in front. But, being incapable of going beyond the larval form, this dandy remains short-coated. He has for wing-cases two wrinkled slips, distant one from the other and hardly covering the first segment of the abdomen, and for wings two stumps that are even more abbreviated. All this hardly covers his nakedness down to the waist. Any one seeing him for the first time takes him for a larva and is wrong. It is indeed the adult insect, ripe for mating; and the insect will remain in this undress to the end. Is it necessary to add that, with this skimpy jacket, stridulation is impossible? The big hind-thighs are there, it is true; but what is lacking, for them to rub upon, is the grating surface, the edge of the wing-cases. Whereas the other Locusts are not to be described as noisy, this one is absolutely dumb. In vain have the most delicate ears around me listened with might and main: there has never been the least sound during the three months’ home breeding. This silent one must have other means of expressing his joys and summoning his partner to the wedding. What are they? I do not know. Nor do I know why the insect deprives itself of wings and remains a plodding wayfarer, when its near kinsmen, on the same Alpine swards, are excellently equipped for flight. It possesses the germs of wing and wing-case, gifts which the egg gives to the larva; and it does not think of using these germs by developing them. It persists in hopping, with no further ambition; it is satisfied to go on foot, to remain a Pedestrian Locust, as the nomenclators call it, when it might, one would think, acquire wings, that higher mechanism of locomotion. Rapid flitting from crest to crest, over the valleys deep in snow; easy flight from a shorn pasture to one not yet exploited: can these be negligible advantages to the Pedestrian Locust? Obviously not. The other Acridians and in particular his fellow-dwellers on the mountain-tops possess wings and are all the better for them. What is his reason for not doing as they do? It would be very profitable to extract from their sheaths the sails which he keeps packed away in useless stumps; and he does not do it. Why? “Arrested development,” says some one.